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Finding the Fourth Proportional to 28,242.86, 38,975.54 and 15,495.80

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Solution

The fourth proportional to 28,242.86, 38,975.54 and 15,495.80 is: 21,384.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,242.86 : 38,975.54 = 15,495.80 : x
  2. Step 2: Convert to fraction form
    28,242.86/38,975.54 = 15,495.80/x
  3. Step 3: Cross multiply
    28,242.86x = 38,975.54 × 15,495.80
  4. Step 4: Simplify right side
    28,242.86x = 603,957,119.61
  5. Step 5: Solve for x
    x = 603,957,119.61/28,242.86
  6. Step 6: Final answer
    x = 21,384.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.